And what is role of product managers then? What should they do? The idea of product managers to be cross functional team between sales, support and engineering

And what is role of product managers then? What should they do? The idea of product managers to be cross functional team between sales, support and engineering. Sure you can make engineers to do sales too: but you will end up with product managers. Anyway I 100% understand the point here: in small teams you don’t have so many roles. An engineer who is good engough in support and sales will become product managers (in future). Or support guy who understand code and feels the sales. I think that is a valid approach to grow.